semestertoets_2_memo.pdf - UNIVERSITY OF PRETORIA...

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1 UNIVERSITY OF PRETORIA/ UNIVERSITEIT VAN PRETORIA DEPARTMENT OF ZOOLOGY & ENTOMOLOGY DEPARTEMENT DIERKUNDE & ENTOMOLOGIE Animal Diversity ZEN 161 / Diereverskeidenheid ZEN 161 Semester Theory Test 2 / Semester Teorie Toets 2 17 September 2009 Examiners / Eksaminatore: Time / Tydsduur: 1 hour / 1 uur Dr M.P. Robertson Marks/ Punte: 50 Dr B.J. van Rensburg Prof M. van der Merwe Prof A.E. McKechnie Prof C.H. Scholtz MEMO Question 1 / Vraag 1 a) Give the names of the three eons in the geological record. / Gee die name van die drie tydperke (eone) in die geologiese rekord. Phanerozoic Proterozoic Archaean (3) (b) Name two of the eras of the youngest eon. / Noem twee van die eras van die jongste tydperk (eon). Any two of the following: Cenozoic Mesozoic Paleozoic (2) Question 2 / Vraag 2 Explain the differences in cleavage between protostome development and deuterostome development. / Verduidelik die verskille in kliewing tussen protostoom ontwikkeling en deuterostoom ontwikkeling. (5) Protostome: cleavage spiral and determinate Deuterostome: cleavage radial and intermediate (Only if the answer is 100% correct give 5 marks, otherwise it should be 3, 2, 1 or 0 i.e. there is no 4 marks)
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2 Question 3 / Vraag 3 Briefly discuss the attributes that insects have that contribute to making them such a large and successful group? / Bespreek kortliks die eienskappe wat bydra tot die grootte en sukses van insekte as groep? (5) Age very old group, since Devonian Small many insects per habitat Short life-cycle rapid turnover of generations Association with plants
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